Doerken appoints Welp marketing and sales director

February 2010 - Doerken MKS Systeme GmbH & Co., parent company of Doerken Corp. USA, Grass Lake, Mich., appointed Dr. Martin Welp to marketing and sales managing director. He will be responsible for worldwide sales and marketing of company products and services. Welp's most recent position was with Evonik Industries AG.